What is the cheapest airline that flies from Idaho Falls Fanning Field to Illinois?

Alaska Airlines, United Airlines, and Delta are the most popular carriers operating from Idaho Falls Fanning Field to Illinois

What airlines fly to Illinois?

American Airlines, United Airlines and Delta are the top three most popular airlines that fly to Illinois from Idaho Falls according to our data. American Airlines is the first choice among our users, with 46% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 3 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

How many flights depart from Idaho Falls to Illinois on average per week?

The number of flights available between Idaho Falls and Illinois is 7 per week as of June 2026. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.

How many flights depart from Idaho Falls to Illinois on average per day?

As of June 2026, there are 1 flights per day flying from Idaho Falls to Illinois. The most common time of day flights depart is 12:00PM, with 100% of flights taking off in the afternoon.

When did momondo last update prices for flights from Idaho Falls Fanning Field Airport to Illinois?

Prices for flights from Idaho Falls Fanning Field Airport to Illinois are refreshed on a daily basis.

How many operators does momondo search for flights from Idaho Falls Fanning Field Airport to Illinois?

The number of operators available for flights from Idaho Falls Fanning Field Airport to Illinois is 3 as of June 2026.

How old do you have to be to fly from Idaho Falls Fanning Field Airport to Illinois?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Idaho Falls Fanning Field Airport to Illinois.

What documentation or ID do you need to fly to Illinois?

The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$136 Cheap Flights from Idaho Falls to Illinois in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Idaho Falls to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

3:17 pm - 9:30 pm

IDA

ORD

5h 13m

1 stop

7:48 am - 2:35 pm

ORD

IDA

7h 47m

1 stop

$291Delta

Tue, Aug 18 - Wed, Aug 26

10:54 pm - 5:37 am

IDA

ORD

29h 43m

1 stop

7:15 am - 4:05 pm

ORD

IDA

9h 50m

1 stop

$300Multiple Airlines

Mon, Aug 10 - Mon, Aug 17

1:58 pm - 6:35 pm

IDA

ORD

3h 37mnonstop

9:40 am - 12:20 pm

ORD

IDA

3h 40mnonstop

$301American Airlines

Sat, Oct 3 - Mon, Oct 5

2:28 pm - 9:52 pm

IDA

ORD

6h 24m

1 stop

5:00 am - 9:53 am

ORD

IDA

5h 53m

1 stop

$304United Airlines

Wed, Oct 7 - Tue, Oct 13

2:30 pm - 8:40 pm

IDA

ORD

5h 10m

1 stop

5:00 am - 9:50 am

ORD

IDA

5h 50m

1 stop

$310United Airlines

Sat, Jul 11 - Sat, Jul 18

10:54 pm - 12:33 am

IDA

ORD

24h 39m

2 stops

7:15 am - 4:05 pm

ORD

IDA

9h 50m

1 stop

$311Multiple Airlines

Mon, Aug 10 - Mon, Aug 17

6:45 pm - 8:34 am

IDA

ORD

12h 49m

2 stops

7:30 am - 12:27 pm

ORD

IDA

5h 57m

1 stop

$315Delta

Mon, Nov 30 - Sat, Dec 5

6:15 am - 2:26 pm

IDA

STL

7h 11m

1 stop

3:24 pm - 10:39 pm

STL

IDA

8h 15m

1 stop

$344Alaska Airlines

Mon, Dec 7 - Tue, Dec 8

2:20 pm - 10:11 pm

IDA

MLI

6h 51m

1 stop

7:33 am - 1:50 pm

MLI

IDA

7h 17m

1 stop

$460American Airlines

Tue, Aug 18 - Thu, Aug 27

6:15 am - 2:26 pm

IDA

STL

7h 11m

1 stop

3:24 pm - 2:27 pm

STL

IDA

24h 03m

2 stops

$566Alaska Airlines

Mon, Dec 7 - Tue, Dec 8

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Delta flights from Idaho Falls to Illinois

Our best Delta deals on Idaho Falls to Illinois flight tickets

Delta

Aug 18

IDA3:17 pmIdaho Falls Fanning Field

5h 13m

1 stop

ORD9:30 pmChicago O'Hare Intl

Aug 26

ORD7:48 amChicago O'Hare Intl

7h 47m

1 stop

IDA2:35 pmIdaho Falls Fanning Field

$291

Delta

Nov 30

IDA6:45 pmIdaho Falls Fanning Field

12h 49m

2 stops

ORD8:34 amChicago O'Hare Intl

Dec 5

ORD7:30 amChicago O'Hare Intl

5h 57m

1 stop

IDA12:27 pmIdaho Falls Fanning Field

$315

Delta

Aug 18

IDA3:17 pmIdaho Falls Fanning Field

5h 13m

1 stop

ORD9:30 pmChicago O'Hare Intl

Aug 22

ORD7:48 amChicago O'Hare Intl

7h 47m

1 stop

IDA2:35 pmIdaho Falls Fanning Field

$355

United Airlines flights from Idaho Falls to Illinois

Our best United Airlines deals on Idaho Falls to Illinois flight tickets

United Airlines

Oct 7

IDA2:28 pmIdaho Falls Fanning Field

6h 24m

1 stop

ORD9:52 pmChicago O'Hare Intl

Oct 13

ORD5:00 amChicago O'Hare Intl

5h 53m

1 stop

IDA9:53 amIdaho Falls Fanning Field

$304

United Airlines

Jul 11

IDA2:30 pmIdaho Falls Fanning Field

5h 10m

1 stop

ORD8:40 pmChicago O'Hare Intl

Jul 18

ORD5:00 amChicago O'Hare Intl

5h 50m

1 stop

IDA9:50 amIdaho Falls Fanning Field

$310

United Airlines

Sep 25

IDA5:51 pmIdaho Falls Fanning Field

5h 08m

1 stop

ORD11:59 pmChicago O'Hare Intl

Sep 28

ORD5:00 amChicago O'Hare Intl

5h 53m

1 stop

IDA9:53 amIdaho Falls Fanning Field

$329

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Tue 8/18

3:17 pm-9:30 pm

1 stop5h 13m

Chicago O'Hare Intl

Wed 8/26

7:48 am-2:35 pm

1 stop7h 47m

$291

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Mon 8/10

10:54 pm-5:37 am

1 stop29h 43m

Chicago O'Hare Intl

Mon 8/17

7:15 am-4:05 pm

1 stop9h 50m

$300

Quickest round-trip

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Sat 10/3

1:58 pm-6:35 pm

Nonstop3h 37m

Chicago O'Hare Intl

Mon 10/5

9:40 am-12:20 pm

Nonstop3h 40m

$301

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Wed 10/7

2:28 pm-9:52 pm

1 stop6h 24m

Chicago O'Hare Intl

Tue 10/13

5:00 am-9:53 am

1 stop5h 53m

$304

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Sat 7/11

2:30 pm-8:40 pm

1 stop5h 10m

Chicago O'Hare Intl

Sat 7/18

5:00 am-9:50 am

1 stop5h 50m

$310

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Mon 8/10

10:54 pm-12:33 am

2 stops24h 39m

Chicago O'Hare Intl

Mon 8/17

7:15 am-4:05 pm

1 stop9h 50m

$311

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Mon 11/30

6:45 pm-8:34 am

2 stops12h 49m

Chicago O'Hare Intl

Sat 12/5

7:30 am-12:27 pm

1 stop5h 57m

$315

Idaho FallsSt. Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Mon 12/7

6:15 am-2:26 pm

1 stop7h 11m

Lambert-St Louis

Tue 12/8

3:24 pm-10:39 pm

1 stop8h 15m

$344

Idaho FallsMoline

IDA - MLI

IDAMLI

Idaho Falls Fanning Field

Tue 8/18

2:20 pm-10:11 pm

1 stop6h 51m

Moline Quad-City

Thu 8/27

7:33 am-1:50 pm

1 stop7h 17m

$460

Idaho FallsSt. Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Mon 12/7

6:15 am-2:26 pm

1 stop7h 11m

Lambert-St Louis

Tue 12/8

3:24 pm-2:27 pm

2 stops24h 03m

$566

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Idaho Falls to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Idaho Falls is in June. Flight prices, which tend to average around $144, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of June, then flying in July is also cheap. Prices for this month can be found on momondo for an average of $184.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Idaho Falls to Illinois is on a Tuesday when prices can be found for as low as $409. Flights from Idaho Falls to Illinois on a Sunday will generally be more expensive and average around $768. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is at noon. Flights from Idaho Falls to Illinois during this time can be as low as $479. Flights in the morning are often more expensive with an average ticket price of $522.

What is the cheapest Idaho Falls Fanning Field to Illinois flight route?

Fly from Idaho Falls Fanning Field to Chicago O'Hare Intl for the best Idaho Falls Fanning Field - Illinois flight prices

What cabin class options are available on Idaho Falls to Illinois flights?

There are 2 cabin classes available to choose from on Idaho Falls to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Idaho Falls to Illinois flights?

No. A direct flight is the cheapest option for a flight between Idaho Falls to Illinois.

Cheap Idaho Falls to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Idaho Falls to Illinois

Best Price Found	$270
Fastest flight time	3h 27m
Direct flights	Every day
Airports in Illinois	98 airports

The best one-way flight to Illinois from Idaho Falls in the past 72 hours is $270. The best round-trip flight deal from Idaho Falls to Illinois found on momondo in the last 72 hours is $486.

The fastest flight from Idaho Falls to Illinois takes 3h 27m

Direct flights go from Idaho Falls to Illinois every day.

There are 98 airports in Illinois. From Idaho Falls there are direct flights to Chicago O'Hare Intl (ORD).

Search flight deals

Frequently asked questions about flying from Idaho Falls to Illinois

When did momondo last update prices for flights from Idaho Falls Fanning Field Airport to Illinois?
Prices for flights from Idaho Falls Fanning Field Airport to Illinois are refreshed on a daily basis.
How many operators does momondo search for flights from Idaho Falls Fanning Field Airport to Illinois?
The number of operators available for flights from Idaho Falls Fanning Field Airport to Illinois is 3 as of June 2026.
How old do you have to be to fly from Idaho Falls Fanning Field Airport to Illinois?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Idaho Falls Fanning Field Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Idaho Falls to Illinois?
momondo data reveals that the most frequently booked plane model on the route from Idaho Falls to Illinois is Canadair (Bombardier) Regional Jet 700, representing 58.97% of all bookings. The subsequent popular models are Embraer 175 (Enhanced Winglets) at 10.26%, Boeing 737 MAX 8 at 7.69%, and Boeing 737 MAX 9 at 7.69%.

Best airlines flying from Idaho Falls to Illinois

Compare and see reviews for airlines that fly from Idaho Falls to Illinois with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $144	Free Cancellation	Rating 7.8 8,418 reviews	Search Delta flights
United Airlines	PriceFrom $311	Free Cancellation	Rating 7.4 9,860 reviews	Search United Airlines flights
American Airlines	PriceFrom $331	Free Cancellation	Rating 7.1 11,703 reviews	Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Idaho Falls to Illinois?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Idaho Falls to Illinois for you.

Can I find flights from Idaho Falls to Illinois with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Idaho Falls to Illinois flights to just show those with flexible booking policies.

How can momondo help me find flights from Idaho Falls to Illinois?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Illinois from Idaho Falls.

I’m not ready to book a flight from Idaho Falls to Illinois right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Idaho Falls to Illinois flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Popular cities in Illinois

Flights to New Yorkfrom $82

Flights to Los Angelesfrom $56

Flights to Orlandofrom $62

Flights to Miamifrom $50

Flights to Chicagofrom $55

Flights to San Franciscofrom $56

Flights to Las Vegasfrom $51

Flights to Washington, D.C.from $56

Flights to Bostonfrom $72

Flights to Atlantafrom $58

Flights to Fort Lauderdalefrom $58

Flights to Dallasfrom $86

Cheap flights from Idaho Falls to Illinois from $136

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Idaho Falls to Illinois departing on 8/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Delta flights from Idaho Falls to Illinois

Our best Delta deals on Idaho Falls to Illinois flight tickets

United Airlines flights from Idaho Falls to Illinois

Our best United Airlines deals on Idaho Falls to Illinois flight tickets

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How to get the cheapest flight ticket from Idaho Falls to Illinois

What is the cheapest month to fly to Illinois?

What is the cheapest day to depart on your flight to Illinois?

What is the cheapest time of day to depart on your flight to Illinois?

What is the cheapest Idaho Falls Fanning Field to Illinois flight route?

What cabin class options are available on Idaho Falls to Illinois flights?

Can stopping save me money on Idaho Falls to Illinois flights?

What is the cheapest airline that flies from Idaho Falls Fanning Field to Illinois?

What airlines fly to Illinois?

How many flights depart from Idaho Falls to Illinois on average per day?

How many flights depart from Idaho Falls to Illinois on average per week?

Cheap Idaho Falls to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Idaho Falls to Illinois

Best Price Found

Fastest flight time

Direct flights

Airports in Illinois

Frequently asked questions about flying from Idaho Falls to Illinois

Best airlines flying from Idaho Falls to Illinois

Compare and see reviews for airlines that fly from Idaho Falls to Illinois with momondo

Why use momondo?

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Illinois

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According to popular flight searches on momondo this year

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